Answer: (Detailed Solution Below)
Option C: Mahanadi
Detailed Solution:
The correct answer is “Mahanadi”.
Among the options provided, the Mahanadi basin is the largest. It covers a significant portion of central India, including parts of Chhattisgarh, Odisha, and Madhya Pradesh.
Ganga > Brahmaputra > Godavari > Krishna > Mahanadi